How can I see custom components in QtDesigner?

I would like to create a folder in the project where to put common components (such as customized buttons or labels), and specifically I would like to see this components in the Qt Designer view, in order to be able to drag-drop those elements while designing new views.

I see that the Qt Designer view only shows to you the components located at the same path of the qml that you are currently developing, but I haven't found a way to display components located in other paths.

The project tree should be something like this:

RootFolder
CommonComponents
Views

where the qmls developed in the Views folder will use components defined in the CommonComponents folder.

Does anyone know how to configure the project or the QtDesigner in order to achieve this goal? Thanks